Le Bourlout, A., Pusenkova, A., Lafrenière-Greig, J., Ropagnol, X., Galstian, T. et Blanchard, F..
2024.
« Terahertz phase imaging of large-aperture liquid crystal modulator with ITO interdigitated electrode ».
Journal of Physics D: Applied Physics, vol. 57, nº 50.
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Résumé
We have fabricated and characterized a large-aperture electrooptic phase modulation device operating in the terahertz (THz) frequency range. The device consists of a 1.6 mm thick nematic liquid crystal placed between glass plates with a novel interdigitated electrode design. Using THz time-domain spectroscopy (THz-TDS) coupled with raster scanning imaging, we evaluated phase modulation across a 25 mm diameter LC device and mapped the spatial uniformity of phase shift. Our results confirm the functionality of the LC cell as a controllable quarter-wave plate at 0.26 THz and half-wave plate at 0.52 THz. This work contributes to the development of large-aperture and transmissive LC devices as low-cost phase plates for THz waves and paves the way for future applications in THz modulators.
| Type de document: | Article publié dans une revue, révisé par les pairs |
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| Professeur: | Professeur Blanchard, François |
| Affiliation: | Génie électrique |
| Date de dépôt: | 25 oct. 2024 15:33 |
| Dernière modification: | 28 oct. 2024 16:34 |
| URI: | https://espace2.etsmtl.ca/id/eprint/29743 |
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